Overview
The ZF 0730.107.805 SUPPORTING RING is a precision-engineered OEM genuine component designed specifically for the WG 65 Series transmission. This critical part functions as a load-bearing spacer within the planetary gear set, ensuring correct axial clearance and maintaining the alignment of rotating assemblies. The SKU 0730.107.805 is manufactured to ZF’s exacting tolerances, preventing metal-to-metal contact between the gear carrier and the TRANSMISSION HOUSING. By stabilizing the internal stack-up, this supporting ring directly contributes to the longevity of the OUTPUT shaft assembly.
Symptoms of Failure
When the 0730.107.805 supporting ring wears beyond specification, operators will notice distinct performance issues. Common failure symptoms include:
- Abnormal gear whine or grinding noise from the WG65 planetary section, particularly under load.
- Intermittent gear slipping during upshifts, caused by excessive axial play in the rotating clutch packs.
- Metallic debris in the transmission fluid filter, indicating the ring has fractured or worn thin.
- Oil leaks near the output flange area, as the misaligned supporting ring stresses the OUTPUT FLANGE seal surface.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 0730.107.805 |
| Material | Case-hardened alloy steel |
| Outer Diameter | 195 mm (approx.) |
| Inner Diameter | 165 mm (approx.) |
| Thickness | 8.5 mm |
| Weight | 0.45 kg |
| Surface Finish | Ground & phosphated |
Compatibility
This supporting ring is a direct-fit OEM replacement for the ZF WG 65 Series transmission family. It is commonly used in the following ZF models: WG65, WG80, WG120, WG150, WG180, and WG200 series. The part is also compatible with certain off-highway and marine variants that share the same planetary carrier architecture. Always verify your transmission serial number against the 0730.107.805 part number before installation.
Related Components
When servicing the WG65 planetary assembly, it is recommended to inspect and replace the following companion parts simultaneously. The HEXAGON SCREW securing the output flange should be torqued to spec during reassembly.
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers torque from planetary gear set |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to driveline |
| 4616101117 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011038 | HEXAGON SCREW | Fastens output flange to shaft |
| 0636016015 | HEXAGON SCREW | Secures bearing retainer plate |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals oil passage between housing sections |
| 0732611049 | FILTER INSERT | Captures debris from hydraulic circuit |
| 0634303718 | O-RING | Seals output flange to housing bore |
| 0636610082 | STUD | Mounting fastener for valve body |
